Chapter 4, Problem 5PP

Define a class called WordCount whose objects count the number of words in a sentence. An object of this class maintains a variable count that is a nonnegative integer. Include methods to set the counter to 0, to increase the count by 1, and to decrease the count by 1 if any word encountered starts with 'A' or 'a'. Be sure that no method allows the value of the counter to become negative. Include an accessor method that returns the current count value and a method that outputs the count to the screen. There should be no input method or other mutator methods. The only method that can set the counter is the one that sets it to 0. Write a program (or programs) to test all the methods in your class definition.